Gasket.



W. S. LOGKE.

GASKET.

APPLICATION FILED NOV. 8. 1909.

Patented mig. 16,1910.

Irwenior: ZUz/z'am 1S. Zbcke.

witnesses.

V if

AgENToFr-IGE.

caLrroan-m.

inclination of Letters `Patent.

sgcxlnaanre, assrenon or TWENTY-FIVE ann l 4 a rn-comm s. noBrNson. TWENTY-noun. AND rrF'rY ons-HUNDREDTHS rnncnnig To HAROLD a'. Harrison', AND arm FIFTY oNi: nurnonnnrirs ran enna. no n. n. BLonenr, ALL or TWENTY-FOUR LOS ANGELES,

f anexar.

Patented Aug. 16, 1910.,

application aiedfn'ovember va, 1909. serial No. 526,754.

To all whom 'it may concern:

lBe it known that ll, WILLIAM S. Looms, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Gaskets, of which the following is 'a s .ecification rThis invention re ates more particularly to a fabric gasket provided with an eX ansible means, and a main object thereo is to,

provide means whereby the wear occasioned by the operation of a gasket will be effectually provided for. i

A furtherV obj ect is to provide a novel form of gasket whereby the expansible means is incorporated therein and forms a e part thereof.. y

ln the accomplishmentof the .above objects ll vpreferably employ a plurality of fabric strips cut on the bias to yprevent raveling and wrapped in atubular form, in combination silient substance interposed between the fabric wrappin' and attached theretol ln the awings attached hereto `and forming a part of this specification: Figure 1- is a longitudinal section through the gas ket, showing it in an operative relation to apump rod and casing. Fig. 2* is a fragf formed entirely of fabric wrapped and` secured together in a tubular form, no provision beingmade for the wear occasioned the periphery of the gasket from its .frictional -engagement with the perimeter of the pump casing, thus necessitating a frequent replacement of the gasket. y By the employment of my improved gasket construction, all leakage around the plunger of the pump is eliminated as well as frictional wear on the periphery of the gasket is provided for by the resilient expander, thus contributing materially to the economical and efficient operation of the pump.

Referring more especially to the drawings, 5 designates a. pump casingof usual construction, (a portion only bein shown) 6 a hollow pump rod, and 7 a bal valve of usual construction in screv7 threaded engage- L ment with the lower end thereof.

with a wrapping or layer of re!4 pumping of oil wells and the like, the gaskets employed have beenform, and is constructed of a plurality of layers of fabric 9, l0, the fabric being 'cut on the bias to preventfraveling. Inside layer 9 preferably consists of two wrappings, while the outside layer consists of several wrappings, bemglgreatly in .excess of the number of the inside wrappings. Interposed between t-he two wrappings is an eXpansible or resilient member 11 preferably of a cylindrical layer of rubber vulcanized thereto, the thickness of this layer depending entirely on the amount of resiliency needed .and also on the diameter of the gasket.

Preferably attached at either end of the gasket is a metallic thimble 12, 13,'the upper thimble 12 being held in engagement with the gasket by a layer of rubber 14 vulcanized thereto. rl`he lower thimble 13 is in screw threaded engagement' with the lower 'end of the pump rod and is also cemented tothe gasket by a layer of rubber 15l similar to the upper thimble. The inside diameter of the gasket is preferably slightly greater than the outside diameter of the pump rod, the purpose being to form a small cylindrical oil chamber 16, a plurality of apertures 17 formed in the pump rod communieating therewith. y lt will be observed from an inspection of Fig. 1 ofthe drawings that when the gasket is in operative position 4on the rod 6 that the `periphery thereof iszin frictional engagement'with the perimeter of the pump casing, Ythis frictional engagement being desirable in pumping operations and which is often diiicult to constantly maintain. By the employment of an expansible resilient member, as heretofore explained, the oil or other fluid drawn upwardly by the pump valve is forced through the apertures 1n the hollow rod into chamber 16 andv forces or expands t-he gasket into a frictional contact with the casing, packing and providing forexcessive wear of the gasket.I y y The upper partA of the pump rod is provided with an oil outlet valve of usual construction (not shown).

It will be apparent that in employin a gasket of the above described type tat changes in form may be readily accom plished, the eXpansible member 11 perform lng the functions in a satisfactory manner equally as well without the interposition of the oil chamber 16.

Having described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a gasket construction, the combination of a pump Valve and rod of usual construction, of a gasket consisting of a plurality of flexible members, a layer of rub.- ber interposed therebetween, and a metallic thimble vulcanized to the asket at each end thereof, said thimbles being detachably secured to said pump rod.

2. A gasket constructiom comprising a plurality of flexible members, an ex ansible member therebetween, and a meta lic end piece vulcanized at `each end of said gasket.

3. A gasket construction, comprising two fabric layers, a layer of rubber therebetween, and a metallic thimble vulcanized to the rubber layer at each end thereof.

In witness that I claim the fore oing I have hereunto subscribed my name t s 30th day of October, 1909.

WILLIAM S. LOCKE.

Witnesses:

EDMUND A. STRAUBE, Erm COLEMAN. 

